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Meaning of demonology

de•mon•ol•o•gy

Pronunciation: (dē"mu-nol'u-jē), [key]
— n.
  1. the study of demons or of beliefs about demons.
  2. belief in demons.
  3. a group of persons or things regarded as evil or pernicious.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.